77268438438 has 16 divisors (see below), whose sum is σ = 158713549680. Its totient is φ = 25060034016.

The previous prime is 77268438433. The next prime is 77268438439. The reversal of 77268438438 is 83483486277.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77268438433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174027793 + ... + 174028236.

It is an arithmetic number, because the mean of its divisors is an integer number (9919596855).

Almost surely, 2^77268438438 is an apocalyptic number.

77268438438 is an abundant number, since it is smaller than the sum of its proper divisors (81445111242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77268438438 is a wasteful number, since it uses less digits than its factorization.

77268438438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348056071.

The product of its digits is 43352064, while the sum is 60.

The spelling of 77268438438 in words is "seventy-seven billion, two hundred sixty-eight million, four hundred thirty-eight thousand, four hundred thirty-eight".